One of my best friends Step-Brother about 2 years ago was 12 had a high voice and was probably the most legit mature kid I've met at that age. Unless you are like him. 1. Chill 2. Calm 3. Cool 4. Can smack talk without having to studder. You got A+ in my book, but once you try and act cool in front of others in the fireteam.....I'm not gonna protect you. You are on your own. I was on my own back in 2005 when I played COD on PC. Then I got the deep voice in 2006 and from then on I was fine during gaming. I think kids today (5-12) should just play outside and enjoy the world before even playing video games. It can just screw with them mentally. 1. The people online 2. How the game is played I would just make them stick to fun games. Ex. Mario Kart, Mario Party, anything rated E.